This is an ad for a company that drop ships their product from another company that has made its business on offering production and fulfillment of canned (but customizable) 3D knit styles.
Tailored Industries (the factory) says they have over 300 products that are available immediately as white-labeled items at your custom online boutique. I don't know if any of these designs were customized or not, but it is a surprisingly low startup cost to put together a shopify store and have Tailored Industries make your clothes on demand. You need some photos, and a cool looking brand, and they do all of the hard work. I wonder if I should open up my own shop...
Edit: totally sincere question, I don't know their process